Spidergoat the problem is you cannot determine probabilities with both Nature and "God"; therefore either both are equally improbable or equally probable.
Certainly, you can discredit scripture. For instance, you can study the power of prayer and thus come up with the conclusion that it does not actually have any effect on the physical world. Therefore, you can discredit that "God" has any effect on our physical world.
However, to suggest that our universe was created, regardless of process, by an entity that had the intent of creating our universe, is not an illogical or improbable statement within itself. This statement does not assert the nature or intention of this entity; neither does it assert identity, ability, etc
The reason you can compare the Christian God to the flying spaghetti monster is because both make unreasonable claims. Even if we could prove that our universe was created, how in the world can you asser the nature or intention or identity or ability of this creator? There is absolutely zero evidence as to details of "It","Him", "Her".
However what I am repeatedly trying to say is that the core concept, a Creator, is not, in principle and in and of itself, an illogical statement. Rationality and logics has nothing to do with it, because by using rationality, you come up with the conclusion that it's impossible to know; hence, agnosticism.
Let me elaborate. Firstly, let's say there is a valley. You put a person in this valley. This person has zero knowledge of scientific fact and religion. However, he has all the mathematical and logistic capability of an above average man.
If you were to ask this person to come up with ideas as to how he thinks existence came to be, I guarantee you one of those ideas would be creation, as well as natural beginning. Both are logical and rational, based on what we can observe...which is nothing.
Atheism is the rejection of the concept of God; agnosticism is the viewpoint that "God" is unknowable.
Now, again, remember when I say "Creation" I am NOT referring to Creationism. I am also not asserting that this "Creator" has any ability within our universe, nor that he is magical and omniscient and anything of that nature.
By Creator, I simply mean, one who creates. I am not asserting that this entity created our universe out of thin air. Nor am I asserting morality or Heaven or Hell or angels or any thing of that nature.
Simply, the idea that our universe came to be through the actions of an intelligent entity(s), and was intended, rather than it coming to be without intention (naturally). The trouble is, neither of these claims have evidence and neither of these claims CAN have evidence. Therefore, we rely on logics. And then, the problem is neither of these claims outweigh the other in terms of probability.